tui: add `TableView` component for displaying tabular data

Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>

diff --git a/proxmox-tui-installer/src/views/mod.rs b/proxmox-tui-installer/src/views/mod.rs
index 1f58a6bd9dce754904f1dd044b4fdb3e786d5bc9..98c39e366563ad007e9e1c4e5c51193237f759e9 100644 (file)
--- a/proxmox-tui-installer/src/views/mod.rs
+++ b/proxmox-tui-installer/src/views/mod.rs
@@ -1,3 +1,5 @@
+mod table_view;
+
 use cursive::{
     event::{Event, EventResult},
     view::{Resizable, ViewWrapper},
@@ -6,6 +8,8 @@ use cursive::{
 };
 use std::{net::IpAddr, str::FromStr};
 
+pub use self::table_view::*;
+
 pub struct NumericEditView {
     view: EditView,
     max_value: Option<f64>,

diff --git a/proxmox-tui-installer/src/views/table_view.rs b/proxmox-tui-installer/src/views/table_view.rs
new file mode 100644 (file)
index 0000000..7fe51cd
--- /dev/null
+++ b/proxmox-tui-installer/src/views/table_view.rs
@@ -0,0 +1,85 @@
+use cursive::{
+    event::{Event, EventResult},
+    Printer, Vec2, View,
+};
+
+pub trait TableViewItem {
+    fn get_column(&self, name: &str) -> String;
+}
+
+struct TableViewColumn {
+    name: String,
+    title: String,
+}
+
+pub struct TableView<T: TableViewItem> {
+    columns: Vec<TableViewColumn>,
+    items: Vec<T>,
+}
+
+impl<T: TableViewItem> TableView<T> {
+    pub fn new() -> Self {
+        Self {
+            columns: vec![],
+            items: vec![],
+        }
+    }
+
+    pub fn columns(mut self, columns: &[(String, String)]) -> Self {
+        self.columns = columns
+            .iter()
+            .map(|(n, t)| TableViewColumn {
+                name: n.clone(),
+                title: t.clone(),
+            })
+            .collect();
+        self
+    }
+
+    pub fn items(mut self, items: Vec<T>) -> Self {
+        self.items = items;
+        self
+    }
+
+    fn draw_row(p: &Printer, items: impl Iterator<Item = String>, width: usize) {
+        let mut start = Vec2::zero();
+
+        for item in items {
+            p.print(start + ((width - item.len()) / 2, 0), &item);
+
+            start.x += width;
+            p.print(start, "┆");
+        }
+
+        // Clear out the last delimiter again
+        p.print(start, " ");
+    }
+}
+
+impl<T: TableViewItem + 'static> View for TableView<T> {
+    fn draw(&self, p: &Printer) {
+        let col_width = (p.output_size.x - 1) / self.columns.len();
+
+        Self::draw_row(p, self.columns.iter().map(|c| c.title.clone()), col_width);
+        p.print_hdelim(Vec2::new(0, 1), p.output_size.x);
+
+        let mut start = Vec2::new(0, 2);
+        for row in &self.items {
+            Self::draw_row(
+                &p.offset(start),
+                self.columns.iter().map(|c| row.get_column(&c.name)),
+                col_width,
+            );
+
+            start.y += 1;
+        }
+    }
+
+    fn on_event(&mut self, _: Event) -> EventResult {
+        EventResult::Ignored
+    }
+
+    fn required_size(&mut self, constraint: Vec2) -> Vec2 {
+        Vec2::new(constraint.x, self.items.len() + 2)
+    }
+}